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Electrochemical sulfidation of WS 2 nanoarrays: Strong dependence of hydrogen evolution activity on transition metal sulfide surface composition / Daniel Escalera-López; Ross Griffin; Mark Isaacs; Karen Wilson; Richard E. Palmer; Neil V. Rees

Electrochemistry Communications, Volume: 81, Pages: 106 - 111

Swansea University Author: Palmer, Richard

Abstract

The activity of transition metal sulfides for the hydrogen evolution reaction (HER) can be increased by sulfur-enrichment of active metal-sulfide sites. In this report, we investigate the electrochemical sulfidation of atmospherically aged WS2 nanoarrays with respect to enhancing HER activity. In co...

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Published in: Electrochemistry Communications
ISSN: 1388-2481
Published: 2017
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa35839
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Abstract: The activity of transition metal sulfides for the hydrogen evolution reaction (HER) can be increased by sulfur-enrichment of active metal-sulfide sites. In this report, we investigate the electrochemical sulfidation of atmospherically aged WS2 nanoarrays with respect to enhancing HER activity. In contrast to MoS2, it is found that sulfidation diminishes HER activity. Electrochemical and XPS experiments suggest the involvement of insoluble tungsten oxides in the altered HER and electron transfer properties. This demonstrates the strong dependence of the transition metal dichalcogenide (TMD) composition with the successful sulfur incorporation and subsequent HER activity.
Keywords: Transition metal dichalcogenidesHydrogen evolutionSulfidationTungsten disulfideNanoarrays
College: College of Engineering
Start Page: 106
End Page: 111